P1789

Electronic Automatic Transmission Steptronic Fault.

P1789 - Steptronic fault: Plausibility fault

Possible causes:
1. Connectors C0193, C0685, C1664.
2. Circuit integrity C0193/20 (UY) - C1664/2 (UY).
3. Circuit integrity C0193/19 (US) - C1664/3 (US).
4. Circuit integrity C0193/18 (WU) - C0685/3 (WU).
5. Circuit integrity C0685/1 (WG) - C1664/4 (WG).
6. Circuit integrity C1664/1 (NB) - Ground.
7. Steptronic Switch.
8. Transmission High/Low Switch.
9. Electronic Automatic Transmission ECU.

1. Connectors C0193, C0685, C1664.
CONNECTOR
Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

2. Circuit integrity C0193/20 (UY) - C1664/2 (UY).
CIRCUIT_INTEGRITY
Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

3. Circuit integrity C0193/19 (US) - C1664/3 (US).
CIRCUIT_INTEGRITY
Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

4. Circuit integrity C0193/18 (WU) - C0685/3 (WU).
CIRCUIT_INTEGRITY
Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

5. Circuit integrity C0685/1 (WG) - C1664/4 (WG).
CIRCUIT_INTEGRITY
Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

6. Circuit integrity C1664/1 (NB) - Ground.
CIRCUIT_INTEGRITY
Check for open circuit, short circuit to ground, supply or other circuit, damaged or unlatched connector, intermediate connectors or headers

7. Steptronic Switch.
Check for open/short circuit with switch open/closed

8. Transmission High/Low Switch.
Check for open/short circuit with switch open/closed

9. Electronic Automatic Transmission ECU.
No detail available for this fault